Evil nsa-y-2 is Nsa approved for all league and tournament play
Also here is the approved ball manufacturer list... If they make a ball that isn't on the illegal ball list then it is legal. They can't ban a brand of legal ball if it is hit your own.
http://playnsa.com/ApprovedBall.aspx
It all depends on region. We were told last tourtament that we can't use balls with multiple layers anymore.
Thanks. I thought this to be the truth. I guess Tennessee NSA is different